Publikationen

Veröffentlichungen der Arbeitsgruppe um Prof. Dr. Andrea Balducci seit Beginn der Tätigkeit an der Friedrich-Schiller-Universität Jena

Google Scholar Profil Andrea BalducciExterner Link

69 Publikationen filtern

Die Publikationen filtern

Hervorgehobene Autoren sind Angehörige der Universität Jena.

  1. A-Site Vacancy Engineering in KNbO₃ Perovskite for Enhanced Lithium Storage

    ErscheinungsjahrErschienen in:Chemistry of materials : a publication of the American Chemical Society A. Khan, E. Quarez, N. Dupré, E. Gautron, A. Balducci, O. Crosnier, T. Brousse
    Universitätsbibliographie Jena:
    fsu_mods_00024160Externer Link

  2. Sodium and Potassium Storage Behaviour in AgNbO₃ Perovskite

    ErscheinungsjahrErschienen in:Batteries and Supercaps M. Orbay, A. Khan, O. Crosnier, T. Brousse, A. Balducci
    In this work, we report on the investigation the perovskite-type AgNbO₃ as a model negative electrode for sodium and potassium systems. We demonstrated that during the initial discharge, regardless of the inserted cation, the material undergoes an activation mechanism that induces a crystalline-to-amorphous transition. This transition, in turn, leads to an enhancement of the electrode capacity. At 5 A g−¹ sodium-ion AgNbO₃ and Potassium-ion AgNbO₃ display capacities of 81 mAh g−¹ and 60 mAh g−¹, respectively. Furthermore, both electrodes display good cycling stability and efficiency over 350 cycles at 1 A g−¹.
    Universitätsbibliographie Jena:
    fsu_mods_00018108Externer Link

  3. Electrochemical performance of electrochemical double layer capacitors containing pyrrolidinium and ammonium fluorosulfonyl imide in acetonitrile-based electrolytes

    ErscheinungsjahrErschienen in:Electrochimica acta: the journal of the International Society of Electrochemistry I. Patil, T. Burton, A. Ladam, S. Fantini, A. Balducci
    In this study, we conducted a comprehensive analysis of the chemical-physical properties of electrolytes containing the ionic liquids N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide [Pyr₁₃FSI] and N-trimethyl-N-propylammonium bis (fluorosulfonyl)imide [N₁₁₁₃FSI] dissolved in acetonitrile (ACN). We showed that these innovative electrolytes display favourable transport and thermal properties. When used as electrolytes in electrical double layer capacitors (EDLCs), they allow the realization of devices with excellent energy and power density values, which can be maintained over a wide temperature range. When charge-discharge cycles are carried out, the stability of EDLCs containing these alternative electrolytes is comparable to that of devices containing conventional electrolytes. However, during float tests, their stability is affected by the occurrence of anodic dissolution of the Al current collectors.
    Universitätsbibliographie Jena:
    fsu_mods_00023462Externer Link

  4. Dilithium squarate: A game-changing sacrificial salt for pre-lithiation and interphase stabilization in non-SEI forming electrolytes

    ErscheinungsjahrErschienen in:Chemical Engineering Journal M. Granados-Moreno, R. Cid, M. Arnaiz, J. Gómez-Urbano, A. Balducci, E. Goikolea, J. Ajuria
    Universitätsbibliographie Jena:
    fsu_mods_00023540Externer Link

  5. Effect of Water on Local Structure and Dynamics in a Protic Ionic Liquid-Based Electrolyte

    ErscheinungsjahrErschienen in:ChemSusChem :: chemistry & sustainability, energy & materials F. Lundin, T. Stettner, P. Falus, A. Balducci, A. Matic
    Ionic liquids (ILs) are promising candidates for electrolytes for next-generation energy storage and conversion systems. However, a high viscosity of the IL, hampering the ion transport, has led to strategies based on the dilution of the IL with a low-viscosity solvent. Herein, the influence of the addition of water to a protic IL to form a hybrid electrolyte suggested for supercapacitor applications is reported. The experiments directly test predictions from previous molecular dynamics simulations on this and other protic IL/water hybrid electrolytes. From small-angle X-ray scattering and infrared spectroscopy, it is shown that water is inserted in the ionic matrix both as single molecules and in small aggregates. Water molecules hydrogen bonds to the available proton on the IL cation and effectively separates the ion pairs, resulting in an increase in the charge correlation distance. The change in the local structure is also reflected in the local dynamics probed by neutron spin-echo spectroscopy. A local diffusive-type process is revealed that correlates well with macroscopic ion transport, for example, the ionic conductivity. The results from neutron scattering also infer that the different local environments created by the addition of water have a relatively short lifetime.
    Universitätsbibliographie Jena:
    fsu_mods_00024415Externer Link

  6. Unravelling the mechanism of potassium-ion storage into graphite through electrolyte engineering

    ErscheinungsjahrErschienen in:Energy Storage Materials L. Meyer, A. Thiagarajan, A. Koposov, A. Balducci
    Graphite is one of the most widely used anode materials in potassium-ion batteries (PIBs). However, the exact mechanism of K⁺ions intercalation into graphite has not yet been fully understood. In addition, the intercalation process strongly depends on the selection of the electrolyte system. In this work, we evaluated the use of an electrolyte containing 1.5 M potassium bis(fluorosulfonyl)imide (KFSI) dissolved in a mixture of propylene carbonate (PC)/ 1,1,2,2-tetraethoxyethane (TEG)/ vinyl ethylene carbonate (VEC) (62:36:2 vol.%). Using such an electrolyte system it was possible to obtain experimental evidence for the formation of KC₁₆ during the potassium intercalation and deintercalation using in situ Raman spectroscopy and operando X-ray diffraction (XRD). The results are supported by the visual observation of a color change of the graphite electrode surface during the intercalation of K⁺ ions into the graphite lattice. In addition, it has been demonstrated that the selected electrolyte system eliminates the co-intercalation of the solvent into the graphite structure.
    Universitätsbibliographie Jena:
    fsu_mods_00019256Externer Link

  7. Simulations of γ-Valerolactone Solvents and Electrolytes for Lithium Batteries Using Polarizable Molecular Dynamics

    ErscheinungsjahrErschienen in:Molecules: a journal of synthetic chemistry and natural product chemistry A. Pierini, V. Migliorati, J. Gómez-Urbano, A. Balducci, S. Brutti, E. Bodo
    In this paper, we present a molecular dynamics study of the structural and dynamical properties of γ-valerolactone (GVL) both as a standalone solvent and in electrolyte formulations for electrochemistry applications. This study involves developing a new parameterization of a polarizable forcefield and applying it to simulate pure GVL and selected salt solutions. The forcefield was validated with experimental bulk data and quantum mechanical calculations, with excellent agreement obtained in both cases. Specifically, two 1M electrolyte solutions of lithium bis(fluorosulfonyl)imide and lithium bis(oxalate)borate in GVL were simulated, focusing on their ionic transport and highlighting ion solvation structure. Ion pairing in the electrolytes was also investigated through enhanced sampling molecular dynamics, obtaining a detailed picture of the ion dynamics in the GVL solution.
    Universitätsbibliographie Jena:
    fsu_mods_00019633Externer Link

  8. Glyoxal-based electrolytes for high-power potassium-based systems

    Erscheinungsjahr L. Meyer
    Universitätsbibliographie Jena:
    fsu_mods_00025710Externer Link

  9. Pyrrolidinium-based protic ionic liquid electrolytes for high performance RuO₂ micro-supercapacitors

    ErscheinungsjahrErschienen in:Electrochimica acta: the journal of the International Society of Electrochemistry J. Seenath, H. Jabraoui, T. Stettner, A. Balducci, A. Estève, D. Pech, D. Rochefort
    Universitätsbibliographie Jena:
    fsu_mods_00026971Externer Link

  10. TEMPO-based active materials for aqueous organic batteries

    Erscheinungsjahr E. Schröter-Michel
    Modern energy storage systems must be flexibly compatible to the requirements of both energy production and energy consuming devices. Therefore, the active materials in the battery must also be compatible to a wide range of application scenarios. This can be achieved by integrating polymeric active materials that can be tailor-made for specific applicaiton scenarios. This work presents TEMPO (2,2,4,4-tetramethylpiperidine-N-oxyl radical) based polymeric active materials and their application in aqueous redox flow batteries and solid polymer batteries with aqueous electrolytes. The polymers discussed in this work are available through straightforward synthesis and compatible with aqueous electrolytes. The presented TEMPO-based solid polymer batteries exhibit high energy densities, high rate capability and long cycle life. Therefore, polymers that were characterized for their use in solid state were integrated into a redox flow battery. Here, the redox targeting approach is utilized to increase the volumetric energy density of the redox flow battery setup. The overall flow battery capacity of redox flow batteries was increased by the addition of a solid polymer composite with intrinsically high specific capacity to a flow circuit, where it is charged through a soluble redox mediator. By this, it is shown that TEMPO-bearing polymers can fulfill the requirements of both high and low energy density storage applications for stationary and flexible use cases.
    Universitätsbibliographie Jena:
    fsu_mods_00026846Externer Link

  11. Protic and Aprotic Acetate-Based Ionic Liquids as Electrolytes for Electrical Double Layer Capacitors

    ErscheinungsjahrErschienen in:ChemElectroChem Z. Zheng, S. Liu, A. Balducci
    This work presents the synthesis, characterization, and application of a series of aprotic and protic acetate-based ionic liquids (AcILs). These cost-effective ILs can be obtained through a simple synthesis and display good transport and thermal properties. When used as electrolytes in electrical double-layer capacitors (EDLC) they enable the fabrication of devices with an operating voltage as high as 1.8 V, which display very good cycling and float stability. The performance of these devices can be tuned by adjusting the water content of the ILs. Notably, EDLCs containing AcILs can also be realized using aluminum current collectors.
    Universitätsbibliographie Jena:
    fsu_mods_00023528Externer Link

  12. Innovative electrolytes for high power devices

    Erscheinungsjahr M. Orbay
    This PhD thesis addresses challenges in performance, safety, and sustainability of lithium-ion batteries. A novel AgNbO₃-based perovskite anode is explored for LIBs, sodium-ion batteries, and potassium-ion batteries. The material’s unique structure, featuring exsoluted silver and open tunnel frameworks, enables fast Li⁺ diffusion and multi-valent Nb⁵⁺/Nb³⁺ redox activity. In LIBs, in-situ XRD, EELS, and XPS revealed a phase transition-driven amorphization that enhances lithium storage capacity. The role of A-site vacancies and Ag nanoparticle alloying was further clarified, highlighting the perovskite’s suitability for energy storage. AgNbO₃ also demonstrates pseudocapacitive behavior in Na⁺ and K⁺ systems. Operando Raman and ex-situ XRD indicate a similar activation mechanism to Li⁺ but with distinct voltage plateaus. While Na⁺ storage combines intercalation and surface redox processes, K⁺ storage is dominated by capacitive surface reactions, enabling efficient high-rate performance. These findings position AgNbO₃ as a versatile anode for multiple ion chemistries. Parallel work focused on LIB electrolyte design. A new formulation (DT2F), based on DOL:TEG solvents and LiFSI salt, showed superior thermal stability, low flammability, and a robust SEI. Electrochemical testing across wide temperature and C-rate ranges demonstrated enhanced performance versus conventional LP30. XPS and SEM confirmed a thinner SEI rich in -F and -S species, indicating favorable LiFSI decomposition pathways. Additionally, a bio-derived additive, itaconic anhydride (ITC), was studied as a sustainable and bio-sourced alternative to vinylene carbonate. ITC promotes SEI formation on graphite in PC-based electrolytes and mitigates co-intercalation and exfoliation. In-situ Raman revealed staged lithiation, and XPS identified polymerization-driven SEI formation rich in C–O/COO⁻ species. These results highlight ITC’s promise as a green additive for next-generation LIBs.
    Universitätsbibliographie Jena:
    fsu_mods_00026099Externer Link
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